Function CDR_PROP

In Asterisk 12, how should I call the function CDR_PROP
“set(CDR_PROP(disable)=true)”
or simply CDR_PROP(disable)
I am getting two records per call attempt, and I cannot figure out how to go back to get only one record. So far I am using this technique, but it changes nothing. My calls always involve a single caller a single calee